Constants

Double-precision floating-point mathematical constants.

Usage

var constants = require( '@stdlib/constants/float64' );

constants

Double-precision floating-point mathematical constants.

var c = constants;
// returns {...}
  • APERY: Apéry's constant.
  • CATALAN: Catalan's constant.
  • CBRT_EPS: cube root of double-precision floating-point epsilon.
  • E: the mathematical constant e.
  • EPS: difference between one and the smallest value greater than one that can be represented as a double-precision floating-point number.
  • EULERGAMMA: the Euler-Mascheroni constant.
  • EXPONENT_BIAS: the bias of a double-precision floating-point number's exponent.
  • FOURTH_PI: one fourth times the mathematical constant π.
  • FOURTH_ROOT_EPS: fourth root of double-precision floating-point epsilon.
  • GAMMA_LANCZOS_G: arbitrary constant g to be used in Lanczos approximation functions.
  • GLAISHER: Glaisher-Kinkelin constant.
  • HALF_LN2: one half times the natural logarithm of 2.
  • HALF_PI: one half times the mathematical constant π.
  • HIGH_WORD_ABS_MASK: high word mask for excluding the sign bit of a double-precision floating-point number.
  • HIGH_WORD_EXPONENT_MASK: high word mask for the exponent of a double-precision floating-point number.
  • HIGH_WORD_SIGN_MASK: high word mask for the sign bit of a double-precision floating-point number.
  • HIGH_WORD_SIGNIFICAND_MASK: high word mask for the significand of a double-precision floating-point number.
  • LN_HALF: natural logarithm of 1/2.
  • LN_PI: natural logarithm of the mathematical constant π.
  • LN_SQRT_TWO_PI: natural logarithm of the square root of 2π.
  • LN10: natural logarithm of 10.
  • LN_TWO_PI: natural logarithm of 2π.
  • LN2: natural logarithm of 2.
  • LOG10E: base 10 logarithm of the mathematical constant e.
  • LOG2E: base 2 logarithm of the mathematical constant e.
  • MAX_BASE10_EXPONENT_SUBNORMAL: the maximum base 10 exponent for a subnormal double-precision floating-point number.
  • MAX_BASE10_EXPONENT: the maximum base 10 exponent for a double-precision floating-point number.
  • MAX_BASE2_EXPONENT_SUBNORMAL: the maximum biased base 2 exponent for a subnormal double-precision floating-point number.
  • MAX_BASE2_EXPONENT: the maximum biased base 2 exponent for a double-precision floating-point number.
  • MAX_LN: natural logarithm of the maximum double-precision floating-point number.
  • MAX_SAFE_FIBONACCI: maximum safe Fibonacci number when stored in double-precision floating-point format.
  • MAX_SAFE_INTEGER: maximum safe double-precision floating-point integer.
  • MAX_SAFE_LUCAS: maximum safe Lucas number when stored in double-precision floating-point format.
  • MAX_SAFE_NTH_FIBONACCI: maximum safe nth Fibonacci number when stored in double-precision floating-point format.
  • MAX_SAFE_NTH_LUCAS: maximum safe nth Lucas number when stored in double-precision floating-point format.
  • MAX: maximum double-precision floating-point number.
  • MIN_BASE10_EXPONENT_SUBNORMAL: the minimum base 10 exponent for a subnormal double-precision floating-point number.
  • MIN_BASE10_EXPONENT: the minimum base 10 exponent for a normal double-precision floating-point number.
  • MIN_BASE2_EXPONENT_SUBNORMAL: the minimum biased base 2 exponent for a subnormal double-precision floating-point number.
  • MIN_BASE2_EXPONENT: the minimum biased base 2 exponent for a normal double-precision floating-point number.
  • MIN_LN: natural logarithm of the smallest normalized double-precision floating-point number.
  • MIN_SAFE_INTEGER: minimum safe double-precision floating-point integer.
  • NAN: double-precision floating-point NaN.
  • NINF: double-precision floating-point negative infinity.
  • NUM_BYTES: size (in bytes) of a double-precision floating-point number.
  • PHI: golden ratio.
  • PI_SQUARED: π².
  • PI: the mathematical constant π.
  • PINF: double-precision floating-point positive infinity.
  • PRECISION: effective number of bits in the significand of a double-precision floating-point number.
  • SMALLEST_NORMAL: smallest positive normalized double-precision floating-point number.
  • SMALLEST_SUBNORMAL: smallest positive denormalized double-precision floating-point number.
  • SQRT_EPS: square root of double-precision floating-point epsilon.
  • SQRT_HALF_PI: square root of the mathematical constant π divided by 2.
  • SQRT_HALF: square root of 1/2.
  • SQRT_PHI: square root of the Golden ratio (φ).
  • SQRT_PI: square root of the mathematical constant π.
  • SQRT_THREE: square root of 3.
  • SQRT_TWO_PI: square root of the mathematical constant π times 2.
  • SQRT_TWO: square root of 2.
  • TWO_PI: the mathematical constant π times 2.

Examples

var objectKeys = require( '@stdlib/utils/keys' );
var constants = require( '@stdlib/constants/float64' );

console.log( objectKeys( constants ) );
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